View Single Post
Old 05-26-2009, 03:02 PM   #570 (permalink)
smartbomb
Banned
 
Join Date: Jan 2009
Location: Cypress Ca
Posts: 69
Drives: 300ZXTT, 350Z, 200SX
Rep Power: 0
smartbomb is on a distinguished road
Default

Quote:
Originally Posted by antennahead View Post
Thanks. I seem to be averaging about the same temps you posted in spirited driving, when the outside air is in the 70 to 75 range. I am at about 1700 miles now, so close to your mileage. This past week we had some unusually cool weather for this time of year, and the temps were in the above ranges. A week earlier, we hit 90, and in that outside temp range I hit 260, and stayed there for about 20 minutes or so. Right after I hit 260, I encountered some rush hour bumper to bumper traffic, and couldn't cruise and force some decent air through the car. It will be interesting to see how the car responds to more 90 degree weather. I am not convinced that past break-in, in 90+ outside temps, that I won't run hot.......... and down here, it is nothing late summer to hit 100 degress for days in a row, with high humidity to boot. Time will tell................

John
Revs are an issue with oil temp as well. If the engine is pushed towards the redline two things happen, more windage and churning of the oil in the crankcase, this produces heat and more oil being pumped to the top of the motor, less in the sump so a small quantitiy of oil being pumped through the engine over and over. This cause the oil to gain heat. There can be as much as 3 quarts of oil not in the pan due to this at high RPM under some conditions. So at 6000 rpm you might have ok temps but at over 7000 no.

Thats why guys that are autocrossing in short spurt are seeing high oil temps.
smartbomb is offline